预应变对低合金钢循环滞回能的影响

Effect of Prestrain on the Cyclic Hysteresis Energy of a Low Alloy Steel

通过对经历预应变试样的低循环疲劳试验,分析了循环滞回能的循环相关性及其瞬态响应。建立了循环滞回能和总失效吸收能与疲劳寿命之间的关系式,并从能量耗散角度讨论了预应变对疲劳寿命的影响。

Based on the low-cycle fatigue test of prestrained specimens, the cyclic correlativity of the hysteresis energy and its transient response axe studied in this paper. Relationships of fa- tigue life vs. the cyclic hysteresis energy and vs. the total absorption energy are also estab- lished, and based on which the effect of the prestrain on the fatigue life is discussed from the point of view of energy dissipation.